Pipe lenght
08-14-2010, 10:06 AM
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RE: Pipe lenght
Generally measured down centerline of system from exhaust manifold to END of band/start of rear cone @ 13" to 14" range. Start longer and work your way down until engines starts losing torque and gets peaky when staging on the pipe, then back out a tad 
08-14-2010, 10:08 AM
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RE: Pipe lenght
Dave's site has some good info
[link=http://www.prestwich.ndirect.co.uk/techzenoahinstructions.htm]PMB Zenoah[/link]
and a little theory [link=http://www.pmbmodelboats.com/tunedpipetheory.htm]here[/link].
[link=http://www.prestwich.ndirect.co.uk/techzenoahinstructions.htm]PMB Zenoah[/link]
and a little theory [link=http://www.pmbmodelboats.com/tunedpipetheory.htm]here[/link].
